Expansion device for flues of asphalt heating stills



Oct. 23, 1951 A. M. FLYNT, sR

EXPANSION DEVICE FOR FLUES OF ASPHALT HEATING STILLS Filed July 29, 1949 2 SHEETS-SHEET l INVENTOR Auyusi'us Mar/on Hy ATTORNEYS Oct. 23, 1951 A. M. FLYNT, SR 2,572,713

EXPANSION DEVICE FOR FLUES OF ASPHALT HEATING STILLS Filed July 29, 1949 2 SHEETS--SHEET 2 INVENTOR. Auyuszus Mar/0n fT/ mjSr ATTORNEYS Patented Oct. 23, 1 951 UNITED STATES PATENT I OFFICE EXPAN SION V DEVICE FOR FLUES OF ASPHALT HEATING STILLS Augustus Marion Flynt, Sr., Savannah, Ga.

Application July 29, 1949, Serial No. 107,587

1 My invention relates to expansion joints or devices and more particularly to one to'be arranged between the heating flue and the wall of an asphalt heating still through which the flue passes to permit of expansion and contraction without breakage and leakage, and to coolin means for such expansion devices.

In the manufacture of asphalt shingles, roll roofing, insulation and the like, asphalt is heated to high temperatures such as 550 F. in large heating stills which contain approximately 12,000 gallons. Usually two horizontally disposed U-shaped fire flues are arranged within the still near its bottom and extend through the vertical front end wall of the still. The inlet ends of the two fiues are adjacent to each other and are open so that fuel oil and steam burners direct their flames into and through the flues. The latand expensive operation to correct such troubles; and one of the objects of my invention is to provide a simple and effective means which will do away with such welded connections and permit relatively quick, easy and inexpensive replacement of such flues.

Another object of the invention is to provide a practical and relatively inexpensive expansion device between the flue and the asphalt heating still which will permit free sliding movement of the flue through the wall as the parts expand and contract under variation of temperature and with little likelihood of leakage.

A further object is to provide a device of this character with improved means for preventing over-heating or burning of the packing in the device.

With the above and other objects in view the invention resides in the novel combination and arrangement of parts and in the novel features of construction hereinafter fully described and I illustrated in the accompanying drawings in which:

Fig. 1 is a vertical longitudinal sectional view through the inlet portion of a burner flue and a portion of the front Wall of an asphalt still show- Claims. (Cl. 126343.5)

ing the improved expansion device applied there- Fig. 2 is a cross sectional view taken on line 22 of Fig. 1, and

Fig. 3 is a side view of the water-spray means for cooling the packing of the expansion device.

In the embodiment of the invention illustrated, [0 denotes a portion of the vertically disposed front wall of a horizontally disposed asphalt heating still, H denotes the inlet end of a hori-' zontally disposed U-shaped heating flue which extends longitudinally in the lower portion of the still, and I3 denotes a portion of a conventional fuel oil burner which has a suitable atom-- izing nozzle and to which fuel oil and steam are fed through valve controlled feed pipes in the usual manner. The burner is disposed centrally at the inlet of the flue and may be surrounded by an outwardly flared, air guiding ring l4 removably secured as seen in Fig. l by screws or bolts I5 to the outer extremity of the flue. The burner is mounted for ready removal and is supported by the oil and steam supply pipes (not shown).

The heater or burner flue H which is usually I I2 inches in diameter extends through the wall Ill and is slidable in an expansion device generally indicated by the numeral Hi. The latter comprises a cylindrical sleeve ll which extends through a circular opening [8 in the wall and is welded as at l9 therein to project from both sides of the Wall. Within the inner end of the sleeve is a stop ring 26] secured by a weld 2| and at its: outer end is an annular flange 22 carrying a plurality of screw studs 23. Nuts 24 on these studs may be tightened against an annular flange 25 apertured to receive the studs and formed on the outer end of a gland 26 slidably arranged in the outer end of the sleeve and surrounding the flue.

The gland tightens a sectional composition packing 21 in the space between the flue and the sleeve, the packing at one end abutting a metal ring 28 engaged with the stop 20 and at the other end a similar metal ring 29 engaged by the gland or follower 26. It will be seen that the expansion device provides a fluid tight connection or joint between the heating flue and the wall, and

permits expansion and contraction of the long flue within the still.

Due to the intense heat at the inlet end of the flue caused by the flame from the burner, it is desirable to provide a cooling means for the packing in the expansion device. As shown a curved spray head 30 for a coolingfiuid such as Water is arranged in the heating flue opposite the packor tube 30' within the spray head and support it in spaced relation with the wall of the flue by annular series of radially projecting lugs or fingers 33 bent outwardly from the ends of the sleeve-like ring. The spray head is disposed op posite the mid-portion of the packing and the deflector, which projects from opposite sides of the transversely disposed spray head, is of suflicient length to prevent any splashing of the water into the flame projected by the burner through the ring. The deflector directs the spray water to the bottom of the heating flue and the water flows out of the open inlet end of the flue.

It will be seen that my expansion device will do away with the welding of the burner flue directly to the Wall of the heating still and that the construction is such that a burned or worn out flue may be easily replaced by a new one in a short period of time and hence at a comparatively low expense.

From the foregoing, taken in connection with the accompanying drawing, it will be seen that novel and advantageous provision has been made for carrying out the objectsof the invention, and while preferences have been disclosed, attention is invited to the possibility of making variations within the scope of the invention as claimed.

I claim:

1. An expansion device or joint between. a vertical wall of an asphalt heating still and a heating flue which extends through the Wall and has a burner at the outer end of the flue to throw a flame into the flue, said device comprising'a cylindrical sleeve extending through and fixed to the wall, a cylindrical heating flue extending through and spaced from the sleeve, packing means extending longitudinally between the sleeve and flue, and through which the flue is slidable, a transversely disposed and lengthwise curved spray head for a cooling liquid arranged in the flue opposite the central portion of the packing, and an elongated ring-like liquid deflector arranged in the flue opposite the packing and within the spray head to project upon opposite sides of the latter and prevent the spray liquid from dropping into the flame from the burner.

2. The structure of claim 1 in which said spray head is of annular form and said deflector is of cylindrical shape and has external fingers to engage the flue and holdthe deflector concentric with the flue.

3. An expansion device or joint between a vertical wall of an asphalt heating still and a heating flue which extends through the wall and has a burner at the outer end of the flue to throw a flame into the flue, said device comprising a cylindrical sleeve extending through and flxed to the wall, a cylindrical heating flue extending through and spaced from the sleeve, packing means extending longitudinally between the sleeve and flue, and through which the flue is slidable, a spray head within the flue opposite the packing I for directing jets of cooling liquid against the innersurface of the flue and a liquid deflector within the flue to prevent the spray liquid from dropping into the flame from the burner.

. 4; An expansion device or joint between a vertical wall of an asphalt heating still and a heating flue which extends through the wall and has a burner at the outer end of the flue to throw a flame into the flue, said device comprising a cylindrical sleeve extending through the wall and fixed to the latter, the sleeve having an internal stop at its inner end, a cylindrical heating flue extending through the sleeve and spaced therefrom for sliding movement as the flue expands and contracts under changes of temperature, a

packing in the space between the flue and the sleeve, a packing gland adjustably connected to the outer end of the sleeve and extending between the sleeve and flue to compress the packing toward the internal stop, and a spray head for a cooling liquid positioned within the flue close to its internal surface and opposite the packing. for directing jets of liquid against said internal surface.

5. The structure of claim 4 in which said spray.

head is disposed transversely of the flue and curved to conform substantially with the curvature of said internal surface together with a ringlike liquid deflector arranged within the spray head and extending lengthwise of the flue and in opposite directions from the spray head to prevent the spray liquid from dropping into the flame from the burner.

AUGUSTUS MARION FLYNT, SR.

REFERENCES CITED The following references are of record in the file of this patent: 

